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На арку (раму) діє сила F. Визначіть реакції в'язей.
RA = 5,0 кH; RB = 1,87 кH.
RA = 7,27кH; RB = 4,77 кH.
RA = 3,97кH; RB = 7,3 кH.
RA = 5,77кH; RB = 5,77 кH.
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